<?php
/*
 * 小程序微信支付
 */
namespace app\api\controller;
class Wxpay {
    // public function index(){
    //     header('Content-type:text/html; Charset=utf-8');
    //     ini_set('date.timezone','Asia/Shanghai');
    //     $data_s = file_get_contents('php://input');
    //     $data_s = json_decode($data_s,true);
        
    //     $set_body = '支付测试';//支付显示内容
    //     $price = '0.1';//支付金额
    //     $out_trade_no = $data_s['out_trade_no'];//订单号
    //     $timeStamp = $data_s['timeStamp'];//时间戳
    //     $openid = $data_s['openid'];
    //     $noncestr = $data_s['nonceStr'];
         
    //     wechartAddOrder($set_body,$out_trade_no,$price,$openid,$timeStamp,$noncestr);
    // }
    // header('Content-type:text/html; Charset=utf-8');
    // ini_set('date.timezone','Asia/Shanghai');
    // $data_s = file_get_contents('php://input');
    // $data_s = json_decode($data_s,true);
    //统一下单
    
    function wechartAddOrder($appid,$openid,$mch_id,$key,$out_trade_no,$body,$total_fee){
        $url = "https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi";
        $urlarr = parse_url($url);
        $appid = $appid;//appID
        $mchid = $mch_id;//商户ID
        $xlid = '5E3E11BFE2FB1C3CDB98A16D98E13F5071BB5D7E';//秘钥序列号 可在这个网址中查询 https://myssl.com/cert_decode.html
        $data = array();
        $time =  '' . time() . '';
        $data['appid'] = $appid;
        $data['mchid'] = $mchid;
        $data['description'] = $body;//商品描述
        $data['out_trade_no'] = $out_trade_no;//订单编号
        $data['notify_url'] = "https://www.hsshop9.com/你的支付目录路径/notify.php";//回调接口 需根据自己的情况修改
        $data['amount']['total'] = $total_fee;//金额 单位 分
        $data['payer']['openid'] = $openid;//用户openID
        $noncestr=$this->createNoncestr();
        $data = json_encode($data); 
        $key =$this->getSign($data,$urlarr['path'],$noncestr,$time);//签名
        $token = sprintf('mchid="%s",serial_no="%s",nonce_str="%s",timestamp="%d",signature="%s"',$mchid,$xlid,$noncestr,$time,$key);//头部信息
     
        $header  = array(
            'Content-Type:'.'application/json; charset=UTF-8',
            'Accept:application/json',
            'User-Agent:*/*',
            'Authorization: WECHATPAY2-SHA256-RSA2048 '.$token
        );  
        $ret = $this->curl_post_https($url,$data,$header);
        $ret = ltrim($ret,'{"prepay_id":"');
        $ret = rtrim($ret,'}"');
        $timeStamp=$time;
        //微信支付（小程序）签名
        $str = $this->getWechartSign($appid,$timeStamp,$noncestr,'prepay_id='.$ret);
        $arr = array('appid'=>$appid,'timestamp'=>$timeStamp,'package'=>'prepay_id='.$ret,'paySign'=>$str);
        exit(json_encode($arr));
    }
    // $set_body = '支付测试';//支付显示内容
    // $price = '1';//支付金额
    // $out_trade_no = $data_s['out_trade_no'];//订单号
    // $timeStamp = $data_s['timeStamp'];//时间戳
    // $openid = $data_s['openid'];
    // $noncestr = $data_s['nonceStr'];
     
    // wechartAddOrder($set_body,$out_trade_no,$price,$openid,$timeStamp,$noncestr);
     
     
    //微信支付签名
    public function getSign($data=array(),$url,$randstr,$time){
        $str = "POST"."\n".$url."\n".$time."\n".$randstr."\n".$data."\n";
        $key = file_get_contents('apiclient_key.pem');//在商户平台下载的秘钥
        $str = $this->getSha256WithRSA($str,$key);
        return $str;
    }
     
    //调起支付的签名
    public function getWechartSign($appid,$timeStamp,$noncestr,$prepay_id){
        $str = $appid."\n".$timeStamp."\n".$noncestr."\n".$prepay_id."\n";
        $key = file_get_contents('apiclient_key.pem');
        $str = $this->getSha256WithRSA($str,$key);
        return $str;
    }
     
    public function getSha256WithRSA($content, $privateKey){
        $binary_signature = "";
        $algo = "SHA256";
        openssl_sign($content, $binary_signature, $privateKey, $algo);
        $sign = base64_encode($binary_signature);
        return $sign;
    }
     
    /* PHP CURL HTTPS POST */
    public function curl_post_https($url,$data,$header){ // 模拟提交数据函数
        $curl = curl_init(); // 启动一个CURL会话
        curl_setopt($curl, CURLOPT_URL, $url); // 要访问的地址
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0); // 对认证证书来源的检查
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2); // 从证书中检查SSL加密算法是否存在
        curl_setopt($curl, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']); // 模拟用户使用的浏览器
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1); // 使用自动跳转
        curl_setopt($curl, CURLOPT_AUTOREFERER, 1); // 自动设置Referer
        curl_setopt($curl, CURLOPT_POST, 1); // 发送一个常规的Post请求
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data); // Post提交的数据包
        curl_setopt($curl, CURLOPT_TIMEOUT, 30); // 设置超时限制防止死循环
        curl_setopt($curl, CURLOPT_HEADER, 0); // 显示返回的Header区域内容
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); // 获取的信息以文件流的形式返回
     
        curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
        $tmpInfo = curl_exec($curl); // 执行操作
        if (curl_errno($curl)) {
            echo 'Errno'.curl_error($curl);//捕抓异常
        }
        curl_close($curl); // 关闭CURL会话
        return $tmpInfo; // 返回数据，json格式
}

    public function createNoncestr($length = 32) {
        $chars = "abcdefghijklmnopqrstuvwxyz0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++)
        { 
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); 
            
            //作用：生成签名 
        }
        return $str;  
      }
}
